Vulnerability Description
Tautulli is a Python based monitoring and tracking tool for Plex Media Server. Prior to 2.17.2, the unauthenticated /auth/redirect endpoint in plexpy/webauth.py removes forward slashes from the user-controlled redirect_uri parameter but leaves tab, line-feed, and carriage-return characters intact. With the default root HTTP_ROOT configuration, CherryPy HTTPRedirect passes the resulting value to urllib.parse.urljoin, which can resolve the whitespace-bearing path to an attacker-controlled external origin. A user who follows a crafted link can therefore be redirected outside Tautulli for phishing or post-login redirect-flow abuse, while custom non-root HTTP_ROOT configurations are not affected by this bypass. This issue is fixed in version 2.17.2.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/Tautulli/Tautulli/commit/07f9beaa0286f1ab3b5e6be9726c5b2de07e
- https://github.com/Tautulli/Tautulli/releases/tag/v2.17.2
- https://github.com/Tautulli/Tautulli/security/advisories/GHSA-7c9r-fhj9-87xm
- https://github.com/Tautulli/Tautulli/security/advisories/GHSA-7c9r-fhj9-87xm
FAQ
What is CVE-2026-54915?
CVE-2026-54915 is a vulnerability with a CVSS score of 5.4 (MEDIUM). Tautulli is a Python based monitoring and tracking tool for Plex Media Server. Prior to 2.17.2, the unauthenticated /auth/redirect endpoint in plexpy/webauth.py removes forward slashes from the user-c...
How severe is CVE-2026-54915?
CVE-2026-54915 has been rated MEDIUM with a CVSS base score of 5.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-54915?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.